Milling bit holder



FIG. 1 is a left front perspective view of my new milling bit holder design;

FIG. 2 is a right rear perspective view thereof;

FIG. 3 is a right side elevation view thereof, the left side elevation view being a mirror image;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a front view thereof.

The broken dash lines in the figures depict portions of the milling bit holder that form no part of the claimed design. 

CLAIM The ornamental design for a milling bit holder, as shown and described. 